mirror of
https://github.com/golang/go
synced 2024-11-14 08:40:27 -07:00
0efbd10157
Use the following (suboptimal) script to obtain a list of possible
typos:
#!/usr/bin/env sh
set -x
git ls-files |\
grep -e '\.\(c\|cc\|go\)$' |\
xargs -n 1\
awk\
'/\/\// { gsub(/.*\/\//, ""); print; } /\/\*/, /\*\// { gsub(/.*\/\*/, ""); gsub(/\*\/.*/, ""); }' |\
hunspell -d en_US -l |\
grep '^[[:upper:]]\{0,1\}[[:lower:]]\{1,\}$' |\
grep -v -e '^.\{1,4\}$' -e '^.\{16,\}$' |\
sort -f |\
uniq -c |\
awk '$1 == 1 { print $2; }'
Then, go through the results manually and fix the most obvious typos in
the non-vendored code.
Change-Id: I3cb5830a176850e1a0584b8a40b47bde7b260eae
Reviewed-on: https://go-review.googlesource.com/c/go/+/193848
Reviewed-by: Robert Griesemer <gri@golang.org>
75 lines
2.0 KiB
Go
75 lines
2.0 KiB
Go
// run
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test that tiny allocations with finalizers are correctly profiled.
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// Previously profile special records could have been processed prematurely
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// (while the object is still live).
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package main
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import (
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"runtime"
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"time"
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"unsafe"
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)
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func main() {
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runtime.MemProfileRate = 1
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// Allocate 1M 4-byte objects and set a finalizer for every third object.
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// Assuming that tiny block size is 16, some objects get finalizers setup
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// only for middle bytes. The finalizer resurrects that object.
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// As the result, all allocated memory must stay alive.
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const (
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N = 1 << 20
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tinyBlockSize = 16 // runtime._TinySize
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)
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hold := make([]*int32, 0, N)
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for i := 0; i < N; i++ {
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x := new(int32)
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if i%3 == 0 {
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runtime.SetFinalizer(x, func(p *int32) {
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hold = append(hold, p)
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})
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}
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}
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// Finalize as much as possible.
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// Note: the sleep only increases probability of bug detection,
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// it cannot lead to false failure.
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for i := 0; i < 5; i++ {
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runtime.GC()
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time.Sleep(10 * time.Millisecond)
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}
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// Read memory profile.
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var prof []runtime.MemProfileRecord
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for {
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if n, ok := runtime.MemProfile(prof, false); ok {
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prof = prof[:n]
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break
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} else {
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prof = make([]runtime.MemProfileRecord, n+10)
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}
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}
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// See how much memory in tiny objects is profiled.
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var totalBytes int64
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for _, p := range prof {
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bytes := p.AllocBytes - p.FreeBytes
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nobj := p.AllocObjects - p.FreeObjects
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size := bytes / nobj
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if size == tinyBlockSize {
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totalBytes += bytes
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}
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}
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// 2*tinyBlockSize slack is for any boundary effects.
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if want := N*int64(unsafe.Sizeof(int32(0))) - 2*tinyBlockSize; totalBytes < want {
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println("got", totalBytes, "want >=", want)
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panic("some of the tiny objects are not profiled")
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}
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// Just to keep hold alive.
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if len(hold) != 0 && hold[0] == nil {
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panic("bad")
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}
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}
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